50. Why is the new tower made of wood?
(A) To serve as a symbol of environmental concerns.
(B) To reduce the weight and ensure the safety.
(C) Out of the consideration of the limited budget.
(D) To form a contrast with the iron structure of the old tower.
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統計: A(30), B(4), C(4), D(5), E(0) #682004
統計: A(30), B(4), C(4), D(5), E(0) #682004